Hi there! Thanks for your questions and concern. The Pod crib comes complete with a custom mattress that fits the crib perfectly, so there are no gaps for children to get stuck in. The crib is rounded, so there are no corners or gaps to get stuck in. The crib also does not have slats that the child can get stuck in, so bumpers are not needed with this crib. There are decorative holes in the acrylic panels of this crib that provide airflow. I hope this is helpful to you!